|Territory of New Mexico|
|Organized incorporated territory of the United States|
|A map of the later Federal Arizona and New Mexico Territories, split from the original New Mexico Territory of 1851, showing existing counties.|
|Government||Organized incorporated territory|
|•||1851–1852||James S. Calhoun|
|•||1910–1912||William J. Mills|
|Legislature||New Mexico Territorial Legislature|
|•||Treaty of Guadalupe Hidalgo||May 30, 1848|
|•||Organic Act (part of Compromise of 1850)||September 9, 1850|
|•||Gadsden Purchase||June 24, 1853|
|•||Colorado Territory established||February 28, 1861|
|•||Arizona Territory established||February 24, 1863|
|•||Statehood||January 6, 1912|
The Territory of New Mexico was an organized incorporated territory of the United States that existed (with varying boundaries) from September 9, 1850, until January 6, 1912, when the remaining extent of the territory was admitted to the Union as the State of New Mexico, making it the longest-lived organized incorporated territory of the United States, lasting approximately 62 years.
The United States of America (USA), commonly known as the United States or America, is a country comprising 50 states, a federal district, five major self-governing territories, and various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is slightly smaller than the entire continent of Europe's 3.9 million square miles. With a population of over 327 million people, the U.S. is the third most populous country. The capital is Washington, D.C., and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico. The State of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The State of Hawaii is an archipelago in the mid-Pacific Ocean. The U.S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The extremely diverse geography, climate, and wildlife of the United States make it one of the world's 17 megadiverse countries.
New Mexico is a state in the Southwestern region of the United States of America; its capital and cultural center is Santa Fe, which was founded in 1610 as capital of Nuevo México, while its largest city is Albuquerque with its accompanying metropolitan area. It is one of the Mountain States and shares the Four Corners region with Utah, Colorado, and Arizona; its other neighboring states are Oklahoma to the northeast, Texas to the east-southeast, and the Mexican states of Chihuahua to the south and Sonora to the southwest. With a population around two million, New Mexico is the 36th state by population. With a total area of 121,592 sq mi (314,920 km2), it is the fifth-largest and sixth-least densely populated of the 50 states. Due to their geographic locations, northern and eastern New Mexico exhibit a colder, alpine climate, while western and southern New Mexico exhibit a warmer, arid climate.
In 1846, during the Mexican–American War, the U.S. provisional government of New Mexico was established. Territorial boundaries were somewhat ambiguous. After the Mexican Republic formally ceded the region to the United States in 1848, this temporary wartime/military government persisted until September 9, 1850.
The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the Intervención estadounidense en México, was an armed conflict between the United States and Mexico from 1846 to 1848. It followed in the wake of the 1845 U.S. annexation of Texas, not formally recognized by the Mexican government, disputing the Treaties of Velasco signed by Mexican caudillo President/General Antonio López de Santa Anna after the Texas Revolution a decade earlier. In 1845, newly elected U.S. President James K. Polk, who saw the annexation of Texas as the first step towards a further expansion of the United States, sent troops to the disputed area and a diplomatic mission to Mexico. After Mexican forces attacked U.S. forces, Polk cited this in his request that Congress declare war.
Under the provisions of the Kearny Code as promulgated in 1846, the first legislature of New Mexico commenced its session on December 6, 1847. The Council consisted of seven members, with Antonio Sandoval, of Bernalillo County, as president, and the House of twenty-one members, with W.Z. Angney as speaker.
Earlier in the year 1850, a bid for New Mexico statehood was underway under a proposed state constitution prohibiting slavery. The request was approved at the same time that the Utah Territory was created to the north. The proposed state boundaries were to extend as far east as the 100th meridian West and as far north as the Arkansas River, thus encompassing the present-day Texas and Oklahoma panhandles and parts of present-day Kansas, Colorado, Utah, and Arizona, as well as most of present-day New Mexico. Texas raised great opposition to this plan, as it claimed much of the same territory, although it did not control these lands. In addition, slaveholders worried about not being able to expand slavery to the west of their current slave states.
Slavery in the United States was the legal institution of human chattel enslavement, primarily of Africans and African Americans, that existed in the United States of America in the 18th and 19th centuries. Slavery had been practiced in British America from early colonial days, and was legal in all Thirteen Colonies at the time of the Declaration of Independence in 1776. It lasted in about half the states until 1865, when it was prohibited nationally by the Thirteenth Amendment. As an economic system, slavery was largely replaced by sharecropping.
The Territory of Utah was an organized incorporated territory of the United States that existed from September 9, 1850, until January 4, 1896, when the final extent of the territory was admitted to the Union as the State of Utah, the 45th state.
The Arkansas River is a major tributary of the Mississippi River. It generally flows to the east and southeast as it traverses the U.S. states of Colorado, Kansas, Oklahoma, and Arkansas. The river's source basin lies in the western United States in Colorado, specifically the Arkansas River Valley, where the headwaters derive from the snowpack in the Sawatch and Mosquito mountain ranges. It then flows east into the Midwest via Kansas, and finally into the South through Oklahoma and Arkansas.
The Compromise of 1850 put an end to the push for immediate New Mexico statehood. Approved by the United States Congress in September 1850, the legislation provided for the establishment of New Mexico Territory and Utah Territory. It also firmly established the disputed western boundary of Texas.
The Compromise of 1850 was a package of five separate bills passed by the United States Congress in September 1850 that defused a political confrontation between slave and free states on the status of territories acquired in the Mexican–American War. It also set Texas's western and northern borders and included provisions addressing fugitive slaves and the slave trade. The compromise was brokered by Whig Senator Henry Clay and Democratic Senator Stephen Douglas with the support of President Millard Fillmore.
The United States Congress is the bicameral legislature of the Federal Government of the United States. The legislature consists of two chambers: the House of Representatives and the Senate.
Texas is the second largest state in the United States by both area and population. Geographically located in the South Central region of the country, Texas shares borders with the U.S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the southwest, and has a coastline with the Gulf of Mexico to the southeast.
The status of slavery during the territorial period provoked considerable debate. The granting of statehood was up to a Congress sharply divided on the slavery issue. Some (including Stephen A. Douglas) maintained that the territory could not restrict slavery, as under the earlier Missouri Compromise, while others (including Abraham Lincoln) insisted that older Mexican Republic legal traditions of the territory, which abolished black, but not Indian, slavery in 1834, took precedence and should be continued. Regardless of its official status, slavery was rare in antebellum New Mexico. Black slaves never numbered more than about a dozen.
Stephen Arnold Douglas was an American politician and lawyer from Illinois. He was the Democratic Party nominee for president in the 1860 election, but he was defeated by Republican candidate Abraham Lincoln. Douglas had previously bested Lincoln in the 1858 Illinois election for the United States Senate, which is known for the Lincoln–Douglas debates. During the 1850s, Douglas was one of the foremost advocates of popular sovereignty, which held that each territory should be allowed to determine whether to permit slavery within its borders. Douglas was nicknamed the "Little Giant" because he was short in physical stature, but a forceful and dominant figure in politics.
The Missouri Compromise was the legislation that provided for the admission of Maine to the United States as a free state along with Missouri as a slave state, thus maintaining the balance of power between North and South in the United States Senate. As part of the compromise, slavery was prohibited north of the 36°30′ parallel, excluding Missouri. The 16th United States Congress passed the legislation on March 3, 1820, and President James Monroe signed it on March 6, 1820.
Abraham Lincoln was an American statesman, politician, and lawyer who served as the 16th president of the United States from 1861 until his assassination in April 1865. Lincoln led the nation through the American Civil War, its bloodiest war and its greatest moral, constitutional, and political crisis. He preserved the Union, abolished slavery, strengthened the federal government, and modernized the U.S. economy.
As one of the final attempts at compromise to avoid the Civil War, in December 1860, a U.S. House of Representatives committee proposed to admit New Mexico as a slave state immediately. Although the measure was approved by the committee on December 29, 1860, Southern representatives did not take up this offer, as many of them had already left Congress due to imminent declarations of secession by their states.
The American Civil War was a civil war fought in the United States from 1861 to 1865, between the North and the South. The most studied and written about episode in U.S. history, the Civil War began primarily as a result of the long-standing controversy over the enslavement of black people. War broke out in April 1861 when secessionist forces attacked Fort Sumter in South Carolina shortly after Abraham Lincoln had been inaugurated as the President of the United States. The loyalists of the Union in the North proclaimed support for the Constitution. They faced secessionists of the Confederate States in the South, who advocated for states' rights to uphold slavery.
On February 24, 1863, during the Civil War, Congress passed the "Arizona Organic Act", which split off the western portion of the then 12-year-old New Mexico Territory as the new Arizona Territory, and abolished slavery in the new Territory. As in New Mexico, slavery was already extremely limited, due to earlier Mexican traditions, laws, and patterns of settlement. The northwestern corner of New Mexico Territory was included in Arizona Territory until it was added to the southernmost part of the newly admitted State of Nevada in 1864. Eventually, Arizona Territory was organized as the State of Arizona.
The Purchase treaty defines the new border as "up the middle of that river (the Rio Grande) to the point where the parallel of 31° 47' north latitude crosses the same; thence due west one hundred miles; thence south to the parallel of 31° 20' north latitude; thence along the said parallel of 31° 20' to the 111th meridian of longitude west of Greenwich ; thence in a straight line to a point on the Colorado River twenty English miles below the junction of the Gila and Colorado rivers; thence up the middle of the said river Colorado until it intersects the present line between the United States and Mexico." The new border included a few miles of the Colorado River at the western end; the remaining land portion consisted of line segments between points, including at the Colorado River, west of Nogales at , near AZ-NM-Mexico tripoint at , the eastern corners of NM southern bootheel (Hidalgo County) at , and the west bank of Rio Grande at .
The boundaries of the New Mexico Territory at the time of establishment (September 9, 1850) contained most of the present-day State of New Mexico, more than half of the present-day State of Arizona, and portions of the present-day states of Colorado and Nevada. Although this area was smaller than what had been included in the failed statehood proposal of early 1850, the boundary disputes with Texas had been dispelled by the Compromise of 1850.
The Gadsden Purchase was acquired by the United States from Mexico in 1853/1854 (known as the "Venta de La Mesilla" or the "Sale of La Mesilla"), arranged by the then-American ambassador to Mexico, James Gadsden. This added today's southern strip of Arizona and a smaller area in today's southwestern New Mexico to the New Mexico Territory, bringing its land area to the maximum size achieved in its history as an organized territory. The land of 29,640 square miles (76,800 km2) provided a more easily constructed route for a future southern transcontinental railroad line (second of the routes) for the future Southern Pacific Railroad, constructed later in 1881/1883.
The Colorado Territory was established by the "Colorado Organic Act" on February 28, 1861, with the same boundaries that would ultimately constitute the State of Colorado. This Act removed the Colorado lands from the New Mexico Territory.
The creation of the Union Arizona Territory (two years after the ill-fated Confederate Arizona Territory) by the "Arizona Organic Act" on February 24, 1863, removed all the land west of the 109th meridian from the New Mexico Territory, i.e. the entire present-day State of Arizona plus the land that would become the southern part of the State of Nevada in 1864.This Act left the New Mexico Territory with boundaries identical to the eventual State of New Mexico for a half-century until admitted to the Union in 1912 as the 47th state (followed just under six weeks later by the Arizona Territory/State of Arizona, which became the 48th state, finally filling out the coast-to-coast continental expanse of the United States).
As the route to California, New Mexico Territory was disputed territory during the American Civil War. Settlers in the southern part of the Territory willingly joined the Confederate States in 1861 as the newly organized Confederate Territory of Arizona, with a representative delegate to the Confederate Congress in the capital of Richmond. This territory consisted of the southern half of the earlier Federal New Mexico Territory of 1851 and was in contrast to the later Federal Arizona Territory established by the Union in 1863, which was the western half split off from the original U.S. New Mexico Territory. The short-lived Confederate Arizona Territory was the first American territorial entity to be called "Arizona".
The Battle of Glorieta Pass in May 1862, following the retreat of Texan Confederate forces back south to El Paso, placed the area of the Rio Grande valley and eastern New Mexico Territory with the capital of Santa Fe under the control of the Federals with their Union Army.However, the government and leadership of the Confederate Arizona Territory persisted until the end of the Civil War in June 1865 with the surrender of the Trans-Mississippi Department, living in exile in El Paso, Texas with its delegate still in Richmond.
The Gadsden Purchase, known in Mexico as Spanish: Venta de La Mesilla, is a 29,670-square-mile (76,800 km2) region of present-day southern Arizona and southwestern New Mexico that the United States acquired from Mexico by the Treaty of Mesilla, which took effect on June 8, 1854. The purchase included lands south of the Gila River and west of the Rio Grande which the U.S. needed to build a transcontinental railroad along a deep southern route, which the Southern Pacific Railroad later completed in 1881–1883. The purchase also aimed to resolve other border issues.
The Treaty of Guadalupe Hidalgo, officially titled the Treaty of Peace, Friendship, Limits and Settlement between the United States of America and the Mexican Republic, is the peace treaty signed on February 2, 1848, in the Villa de Guadalupe Hidalgo between the United States and Mexico that ended the Mexican–American War (1846–1848). The treaty came into force on July 4, 1848.
The Adams–Onís Treaty of 1819, also known as the Transcontinental Treaty, the Florida Purchase Treaty, or the Florida Treaty, was a treaty between the United States and Spain in 1819 that ceded Florida to the U.S. and defined the boundary between the U.S. and New Spain. It settled a standing border dispute between the two countries and was considered a triumph of American diplomacy. It came in the midst of increasing tensions related to Spain's territorial boundaries in North America against the United States and Great Britain in the aftermath of the American Revolution; it also came during the Latin American wars of independence.
James Gadsden was an American diplomat, soldier and businessman for whom is named the Gadsden Purchase, land which the United States bought from Mexico and which became the southern portions of Arizona and New Mexico. James Gadsden served as Adjutant General of the U. S. Army from August 13, 1821 – March 22, 1822. Between 1853 and 1856, he served as U. S. Minister to Mexico. He was known commonly as General Gadsden, although he never had a rank above Colonel.
The Territory of Kansas was an organized incorporated territory of the United States that existed from May 30, 1854, until January 29, 1861, when the eastern portion of the territory was admitted to the Union as the state of Kansas.
The Mexican Cession is the region in the modern-day southwestern United States that Mexico ceded to the U.S. in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican–American War. This region had not been part of the areas east of the Rio Grande which had been claimed by the Republic of Texas, though the Texas annexation resolution two years earlier had not specified the southern and western boundary of the new State of Texas. The Mexican Cession was the third largest acquisition of territory in US history. The largest was the Louisiana Purchase, with some 827,000 sq. miles, followed by the acquisition of Alaska.
The Territory of Nevada was an organized incorporated territory of the United States that existed from March 2, 1861, until October 31, 1864, when it was admitted to the Union as the State of Nevada.
The Territory of Wyoming was an organized incorporated territory of the United States that existed from July 25, 1868, until July 10, 1890, when it was admitted to the Union as the State of Wyoming. Cheyenne was the territorial capital. The boundaries of the Wyoming Territory were identical to the modern State of Wyoming.
The Territory of Nebraska was an organized incorporated territory of the United States that existed from May 30, 1854, until March 1, 1867, when the final extent of the territory was admitted to the Union as the State of Nebraska. The Nebraska Territory was created by the Kansas–Nebraska Act of 1854. The territorial capital was Omaha. The territory encompassed areas of what is today Nebraska, Wyoming, South Dakota, North Dakota, Colorado, and Montana.
The Territory of Colorado was an organized incorporated territory of the United States that existed from February 28, 1861, until August 1, 1876, when it was admitted to the Union as the State of Colorado.
The Territory of Arizona was a territory of the United States that existed from February 24, 1863 until February 14, 1912, when the remaining extent of the territory was admitted to the Union as the state of Arizona. It was created from the western half of the New Mexico Territory during the American Civil War.
Confederate Arizona, commonly referred to as Arizona Territory, and officially the Territory of Arizona, was a territory claimed by the Confederate States of America during the American Civil War, between 1861 and 1865. Delegates to secession conventions had voted in March 1861 to secede from the New Mexico Territory and the United States, and seek to join the Confederacy. It consisted of the portion of the New Mexico Territory south of the 34th parallel, including parts of the modern states of New Mexico and Arizona. Its capital was Mesilla along the southern border. The Confederate territory overlapped the Arizona Territory later established by the Union government in 1863.
The New Mexico Territory, which included the areas which became the modern U.S. states of New Mexico and Arizona as well as the southern part of present-day Nevada, played a small but significant role in the Trans-Mississippi Theater of the American Civil War. Despite its remoteness from the major battlefields of the east and its existence on the still sparsely populated and largely undeveloped American frontier, both Confederate and Union governments claimed ownership over the territory, and several important battles and military operations took place in the region.
The parallel 36°30′ north is a circle of latitude that is 36 and one-half degrees north of the equator of the Earth. This parallel of latitude is particularly significant in the history of the United States as the line of the Missouri Compromise, which was used to divide the prospective slave and free states west of the Mississippi River, with the exception of Missouri, which is mostly north of this parallel.
The following chronology traces the territorial evolution of the U.S. State of Colorado.
The following timeline traces the territorial evolution of the U.S. State of New Mexico.
The following timeline traces the territorial evolution of the U.S. State of Utah.
The following timeline traces the territorial evolution of the U.S. State of Arizona.
The Country Club Area is a suburb of El Paso, Texas. It was the object of a lengthy border dispute between Texas and New Mexico.
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